
Railway applications - Track - Concrete sleepers and bearers Part 2: Prestressed monoblock sleepers
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Railway applications - Track - Concrete sleepers and bearers Part 2: Prestressed monoblock sleepers
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻